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Method for widening steel-concrete combination

A technology of concrete and raw concrete, which is applied in bridge reinforcement, bridge parts, erection/assembly of bridges, etc. It can solve problems such as unsatisfactory requirements, achieve fast construction, reduce bridge deck cracking, and have good ductility

Active Publication Date: 2009-12-30
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitation of on-site construction conditions and performance, traditional bridge widening methods can no longer meet the requirements in many cases. Therefore, more reasonable and effective widening technologies should be developed and researched to meet the needs of road construction and development.

Method used

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  • Method for widening steel-concrete combination
  • Method for widening steel-concrete combination
  • Method for widening steel-concrete combination

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Experimental program
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Embodiment Construction

[0021] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0022] Construction procedure of the present invention is:

[0023] 1) Gouging the outer side of the web of the original concrete beam 1, and planting L-shaped short steel bars 5, adopting the steel plate connector 4 with studs 3 on the inner side, wrapping it on the outer side of the original concrete beam 1, and reserving pouring holes; pouring reinforcement area Concrete forms the steel plate-concrete composite anchorage connector 2, and reserves the composite anchorage zone's extended corbel 6 for subsequent connection;

[0024] 2) Connect the widened steel beam 9 and the cross-connected steel beam 7 together on site (it can also be completed in the steel structure processing plant), and hoist and position them to the designated position. The widened steel girder 9 can adopt box-shaped or I-shaped cross-sections, and the use of box-shap...

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Abstract

The invention relates to a method for widening a steel-concrete combination, which is a technological method for widening an original concrete bridge. The method widens the original concrete bridge by adopting an integrally and jointly stressed steel-concrete composite beam comprising a concrete bridge deck and a steel beam. The method comprises the following steps: firstly roughening and reinforcing bar loading treatments are carried out on the main beam of the original bridge, a steel plate-concrete composite anchoring and connecting piece is arranged to connect the main beam with the transverse connecting steel beam of the original bridge; the main beam of the original bridge is connected with the steel-concrete composite beam into a whole body through the transverse connecting steel beam; roughening and transverse connecting reinforcing bar loading are carried out on the bridge deck of the original bridge, the bridge deck of the original bridge is extended to the upper bridge deck area of a widened beam, and the widened bridge deck is concreted to form a whole body. Compared with a traditional widening method, the method has the advantages that the structural height can be reduced, the structural dead weight can be reduced, and the lower structural cost can be reduced. Meanwhile, the composite beam is convenient to be produced, the installation quality is high, the construction is economic, convenient and fast, the influence to the normal traffic of the current bridge is small, and the deficiency of the method for widening the traditional concrete beam is overcome.

Description

technical field [0001] The invention relates to a steel-concrete combined widening method applied to the widening of original concrete bridges, and belongs to the technical field of bridge engineering and combined structures. Background technique [0002] At present, there are a large number of highways and urban bridges in my country that need to be rebuilt because the width of the roadway does not meet the use requirements or the function of the bridge is changed. During the remodeling, the concrete beams with the same structure as the original bridge are often used for widening. Limited by site construction conditions and performance, traditional bridge widening methods can no longer meet the requirements in many cases. Therefore, more reasonable and effective widening technologies should be developed and researched to meet the needs of road construction and development. [0003] The steel-concrete composite girder bridge is a structural form in which the concrete bridge ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D22/00E01D19/12E01D101/26E01D101/30
Inventor 聂建国樊健生
Owner TSINGHUA UNIV
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